Sami is looking for apartment for rent in Zürich District 1 - Altstadt, Zürich District 2 or Zürich District 3 - Wiedikon etc., Switzerland

My wife Maisie and I are looking for a long-term home in Zurich — a 3.5-room flat (3 to 4.5 rooms), at least 68 m², with a balcony and a washer/dryer in the flat. Our ideal move-in is 1 February 2027, and no later than 1 March 2027. We prefer a standard open-ended yearly lease.
Our preferred areas are lakeside Seefeld (8008) first, then Sihlfeld (8003), Langstrasse (8004) and Industriequartier (8005). Our budget is around CHF 3,300 per month, and we can stretch above that for the right place in a preferred area. A dishwasher and a lift are a plus.
About us: were a couple with no children and no pets. Maisie works at Goldman Sachs on Bahnhofstrasse, and I work as a consultant in AI training. We currently live in a sublet in Seefeld until the end of January 2027 and are looking for a place to settle long-term.